It has a history of nearly a hundred years from the late Eastern Han Dynasty to the early Western Jin Dynasty. The Three Kingdoms is a historical period in China. At the end of the Eastern Han Dynasty, Cao Cao unified the northern part of China. In fact, he mastered the regime of the Eastern Han Dynasty as a prime minister and won the title of "Wang Wei", adding nine tin. In 220, Cao Cao died of illness and his son Cao Pi succeeded to the throne. In the same year, he forced Liu Xie, the last emperor of the Eastern Han Dynasty, to abdicate to him, and established the Cao Shi regime, which was called Wei in history and Cao Wei in history. At this point, the Eastern Han regime officially perished and the Three Kingdoms period officially began. In 22 1 year, Liu Bei, who was stationed in Yizhou, became emperor himself, with the title of "Han" and was called "Shu Han" in history. In the same year, Sun Quan, who was enfeoffed in Yangzhou, Jingzhou and Jiaozhou, accepted the knighthood of Cao Wei's regime and began to be called the "King of Wu". In 229, he officially proclaimed himself emperor and founded the country, with the title of "Wu" and the historical name of "Soochow". After the Sima family, which actually controlled Cao Wei's regime, was annexed in 263, in 265, Emperor Yuan of Wei was abolished and became independent, with the title of "Jin", which was called "Western Jin" in history. In 280, the Western Jin Dynasty conquered the regime of Sun Wu in the south of the Yangtze River and formally unified China, thus ending the Three Kingdoms period.